This is a dress (one-piece) I purchased online from NEXT about a year and a half ago. It's size 6, which is for 116cm height and 57cm waist. When I ordered it, it was a bit too big, so I stored it away. But when I tried to wear it this year, the sleeves seemed too short, so I'm putting it up for sale. It's new with tags. The main fabric is polyester, but it has a "shibo" (crepe-like texture) like shijira-ori (a type of Japanese fabric), so there aren't many flat areas, and it's thin and feels smooth. The collar is also large, and I think it's cute for both formal and casual occasions. The color in the fourth photo is closest to the actual item.